Mus Demo: Demonstrate external window mode

services/ui/demo/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/ui.gni")
 import("//services/catalog/public/tools/catalog.gni")
 import("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//services/service_manager/public/tools/test/service_test.gni")
 import("//testing/test.gni")
 
 source_set("lib") {
   sources = [
     "mus_demo.cc",
     "mus_demo.h",
-    "mus_demo_internal.cc",
-    "mus_demo_internal.h",
     "window_tree_data.cc",
     "window_tree_data.h",
   ]
 
+  if (use_ozone && !is_chromeos) {
+    sources += [
+      "mus_demo_external.cc",
+      "mus_demo_external.h",
+    ]
+  } else {
+    sources += [
+      "mus_demo_internal.cc",
+      "mus_demo_internal.h",
+    ]
+  }
+
   public_deps = [
     "//services/service_manager/public/cpp:sources",
     "//skia",
   ]
 
   deps = [
     "//base",
     "//mojo/public/cpp/bindings",
     "//services/service_manager/public/cpp",
     "//services/ui/public/cpp",
@@ skipping 60 matching lines @@
 }
 
 catalog("mus_demo_unittests_catalog") {
   embedded_services = [ ":test_manifest" ]
 
   standalone_services = [
     ":manifest",
     "//services/ui:manifest",
   ]
 }